Pipe wrench



AuggA 23, 1927.

J. E. coNwAY A PIPE WRENCH Filed July.5. 1923 Patented Aug. 2,3, i927.

UNITED STATES JOSEPH E. CONWAY, OF BJ.l'J'LIIJIORITJ,l MARYLAND.

PIPE WRENCH.

Application filed July 5,

This invention relates to improvements in wrenches and has for its object to provide a self-operating pipe wrench.

Another object of the invention is to provide a pipe wrench having a spring controlled jaw member.

A still further object of the invention is to provide a pipe wrench having a pivoted wheel jaw.

l/Vith the aboveand such other objects in view as may hereinafter more fully appear, I have invented the device illustrated in the accompanying drawings in which:

The figure is a sectional elevational view of my improved wrench.

Like reference characters indicate like parts throughout the following specification and in the several views in the drawings in which 1 indicates a wrench having an operating shank 2 with a movable wheel jaw 3 pivoted at 4L to the body portion or cross head 5 of said shank. The jaw 3 has ai toothed or cogged periphery 6 the teeth 7 of which are geared with the teeth 8 of the short shank 9 of the jaw 10 integral therewith, which jaw is provided with a toothed surface 11. The body portion 5 has an extension 12 with a passage 13 through which the shank 9 Operates. rlhe shank 9 has a longitudinal slot 1d therein in which is mounted a rod 15 around which is coiled a spring 16 one end of which abuts the end 17 of said slot 1li` and the other end of which engages the wall 18 of the extension 9, said spring normally7 forcing the aws 3 and 1G toward one another.

1n operating the wrench the shank 9 is shoved outwardly by the operator so that the pipe or other article 19 may be engaged between said jaws 3 and l0 after which said shank is released and the shank handle 2 pressed downwardly which operation causes the teeth 11 to grip the member 19 and force said member against the teeth 7 of thev jaw 3, which action causes the rotation of the aw 3 the teeth of which in turn operate the teeth 8 of the shank 9 drawing the jaws together to tightly hind the member 19. The greater the pressure upon the wrench, the tighter the jaws grip the member 19 through said operation.

Having describedmy invention that which I claim to be new and desire to procure by Letters Patent is:

1. A wrench of the character described consisting of a fixed jaw and a movable jaw, an operating shank upon which said last jaw 1923. Serial No. 649,664.

is rotatably mounted, a short shank upon which the first aw is liked, said last shank having a rack, said movable jaw having a toothed periphery for cooperation with the rack, said short shank having a slot and means therein for urging the jaws together. 2. A Vrench of the character described consisting of a fined jaw and a movable jaw, an operating shank upon which said last jaw is rotatably mounted, a short shank upon which the first jaw is lined, said last shank having a rack, said movable jaw having ar toothed periphery for cooperation with the rack, and means for normally forcing the jaws together, said means consisting of a spiral spring, said operating shank having a cross head at its inner end, said head having a passage in one side paralleling the first shank through which the second shank operates, the last shank having a longitudinal slot, and rod around which said spring is coiled extending longitudinally of said slot.

3. is claim 2, anch-said crois head having bearings in its other side, and a pin supported therein and forming an airis upon which the rotatable jaw is mounted.

if. A wrench of the characterl described consisting of a fined aw and a movable jaw, an operating shank upon which said last jaw is rotatably mounted, a short shank upon which the first jaw is fined, said last shank having a rack, said movable jaw having a toothed periphery for cooperation wi'h the rack, and means for normally forcing the jaws together, said means consisting of a spiral spring, sa d operating shank having a inner end, said head havcross head at its ing a passage in one side paralleling the first shank through which the second shank operates, the last shank having a longitudinal slot, and a rod around which said spring is coiledf extending longitudinally of said f y said cross head having bearings in its other side, and a pin supported therein and t' .c ing an axis upon which the rotatable jaw is mounted, said last jaw being so formed that relative movement in one direction of a member between said jaws against said rotatable aw, will cause the last aw to operate upon said rack to force said jaws toward one another.

5. A wrench of the character described consisting of a fixed jaw and a movable aw, a operating shank upon which said last aw is rotatably mounted, a short shank upon which the first jaw is fixed, said last shank having a rack, saidk movable jaw having)- a toothed periphery for Cooperation With the rack, and means for normally forcing the jaws together7 said means Consisting of a` spiral spring, said operating shank having a, cross head at its inner end, said head hat# ing a passage in one side paralleling the irst shank through which the second shank operates, the last shank having a longitudinal slot, and a rod around Whieh'said spring is coiled7 extendingy longitudinally of said slot, said Cross head having bearings in its` other side, and a pin supported therein and Jorming an axis upon which the rotatable aw is mounted, said last jaw beingI so formed that relative movement in one direction` of a membei' between said jaws against said rotatable jaw will cause the last jaw to operate Upon said rack to torce said jaws toward one another and similar movement in'. another Will Cause the jaws to separate.

6. A Wrench of the character described consisting of a ii-Xed aw and a movable avv, an operating shank upon which said last jaw is rotatably mounted, a short shank up on Whieh the first jaw is fixed, said last shank having` a rael, said movable jaw having a toothed periphery for cooperation with the rack, and means lor normally 'foreing the jaws together, said short shank having a- 4free end .-lidable against said operating,l shank by means or' which thumb pressure of the hand holding the last shank will force the jaws apart.

ln testimony Wherei afix my Signature.

JOSEPH E. CCNE-TAY. 

